Hunter S. Thompson used this phrase often to indicate extreme horror in the future and present tenses. According to Chapter 1 of his book "Better Than Sex: Confessions of a Political Junkie Trapped Like a Rat in Mr. Bill's Neighborhood", the phrase comes from H. Wayne Morgan's "Yesterday's Addict". Morgan says: "...while fearing and loathing addiction, many late-nineteenth-century people sympathized with addicts."

fd leak = F = feature

fear and loathing n.

[from Hunter S. Thompson] A state inspired by the prospect of dealing with certain real-world systems and standards that are totally brain-damaged but ubiquitous -- Intel 8086s, or COBOL, or EBCDIC, or any IBM machine bigger than a workstation. "Ack! They want PCs to be able to talk to the AI machine. Fear and loathing time!"

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.